Great scientists don't ________ graduate from well-known universities. Some didn't even attend school a year in total.
| A．usually | B．necessarily | C．extremely | D．formally |
–We didn’t see Tom at the lecture yesterday.
–He _____ it. He had attended the same lecture before.
| A．mustn’t attend | B．can’t have attended |
| C．would have not attended | D．needn’t have attended |
You _____ the flowers more water so that they can grow well now.
| A．would have given | B．might have given |
| C．must have given | D．should have given |
You _____ across the road without looking round; you _____ down by a car.
| A．shouldn’t run, might have been knocked |
| B．shouldn’t have run, might have been knocked |
| C．mustn’t run, could have been knocked |
| D．mustn’t have run, could be knocked |
–Did Ken take the job in the bookstore?
–No, but I think he _____.
| A．will have | B．may have | C．should have | D．must have |
He _____ more than thirty.
| A．mustn’t be | B．shouldn’t be | C．won’t be | D．can’t be |